If I google that model number plus Service Manual I find content like
ftp://helpedia.com/pub/temp/datasheets/monitors/Samsung/Samsung_PN43D450A2DXZA_fast_track_guide_[SM].pdf
This is gold for TV techs. If you are not a TV technician it might be a foreign language.
I have a samsung plasma PN43D450A2DXZA that clicks when I try to turn it on.
I replaced the x board, y board and power supply and it is still clicking when I try to turn it on. What else could it be? Thanks

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